aboutsummaryrefslogtreecommitdiff
path: root/libbb
diff options
context:
space:
mode:
Diffstat (limited to 'libbb')
-rw-r--r--libbb/pw_encrypt_des.c192
1 files changed, 141 insertions, 51 deletions
diff --git a/libbb/pw_encrypt_des.c b/libbb/pw_encrypt_des.c
index 956a3e679..a13e1a5df 100644
--- a/libbb/pw_encrypt_des.c
+++ b/libbb/pw_encrypt_des.c
@@ -56,6 +56,14 @@
* alignment).
*/
+
+/* Parts busybox doesn't need or had optimized */
+#define USE_PRECOMPUTED_u_sbox 1
+#define USE_REPETITIVE_SPEEDUP 0
+#define USE_ip_mask 0
+#define USE_de_keys 0
+
+
/* A pile of data */
static const uint8_t IP[64] = {
58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,
@@ -85,57 +93,93 @@ static const uint8_t comp_perm[48] = {
/*
* No E box is used, as it's replaced by some ANDs, shifts, and ORs.
*/
-
+#if !USE_PRECOMPUTED_u_sbox
static const uint8_t sbox[8][64] = {
- {
- 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
+ { 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7,
0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8,
4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0,
15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13
},
- {
- 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
+ { 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10,
3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5,
0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15,
13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9
},
- {
- 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
+ { 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8,
13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1,
13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7,
1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12
},
- {
- 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
+ { 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15,
13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9,
10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4,
3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14
},
- {
- 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
+ { 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9,
14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6,
4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14,
11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3
},
- {
- 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
+ { 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11,
10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8,
9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6,
4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13
},
- {
- 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
+ { 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1,
13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6,
1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2,
6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12
},
- {
- 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
+ { 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7,
1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2,
7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8,
2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11
}
};
+#else /* precomputed, with half-bytes packed into one byte */
+static const uint8_t u_sbox[8][32] = {
+ { 0x0e, 0xf4, 0x7d, 0x41, 0xe2, 0x2f, 0xdb, 0x18,
+ 0xa3, 0x6a, 0xc6, 0xbc, 0x95, 0x59, 0x30, 0x87,
+ 0xf4, 0xc1, 0x8e, 0x28, 0x4d, 0x96, 0x12, 0x7b,
+ 0x5f, 0xbc, 0x39, 0xe7, 0xa3, 0x0a, 0x65, 0xd0,
+ },
+ { 0x3f, 0xd1, 0x48, 0x7e, 0xf6, 0x2b, 0x83, 0xe4,
+ 0xc9, 0x07, 0x12, 0xad, 0x6c, 0x90, 0xb5, 0x5a,
+ 0xd0, 0x8e, 0xa7, 0x1b, 0x3a, 0xf4, 0x4d, 0x21,
+ 0xb5, 0x68, 0x7c, 0xc6, 0x09, 0x53, 0xe2, 0x9f,
+ },
+ { 0xda, 0x70, 0x09, 0x9e, 0x36, 0x43, 0x6f, 0xa5,
+ 0x21, 0x8d, 0x5c, 0xe7, 0xcb, 0xb4, 0xf2, 0x18,
+ 0x1d, 0xa6, 0xd4, 0x09, 0x68, 0x9f, 0x83, 0x70,
+ 0x4b, 0xf1, 0xe2, 0x3c, 0xb5, 0x5a, 0x2e, 0xc7,
+ },
+ { 0xd7, 0x8d, 0xbe, 0x53, 0x60, 0xf6, 0x09, 0x3a,
+ 0x41, 0x72, 0x28, 0xc5, 0x1b, 0xac, 0xe4, 0x9f,
+ 0x3a, 0xf6, 0x09, 0x60, 0xac, 0x1b, 0xd7, 0x8d,
+ 0x9f, 0x41, 0x53, 0xbe, 0xc5, 0x72, 0x28, 0xe4,
+ },
+ { 0xe2, 0xbc, 0x24, 0xc1, 0x47, 0x7a, 0xdb, 0x16,
+ 0x58, 0x05, 0xf3, 0xaf, 0x3d, 0x90, 0x8e, 0x69,
+ 0xb4, 0x82, 0xc1, 0x7b, 0x1a, 0xed, 0x27, 0xd8,
+ 0x6f, 0xf9, 0x0c, 0x95, 0xa6, 0x43, 0x50, 0x3e,
+ },
+ { 0xac, 0xf1, 0x4a, 0x2f, 0x79, 0xc2, 0x96, 0x58,
+ 0x60, 0x1d, 0xd3, 0xe4, 0x0e, 0xb7, 0x35, 0x8b,
+ 0x49, 0x3e, 0x2f, 0xc5, 0x92, 0x58, 0xfc, 0xa3,
+ 0xb7, 0xe0, 0x14, 0x7a, 0x61, 0x0d, 0x8b, 0xd6,
+ },
+ { 0xd4, 0x0b, 0xb2, 0x7e, 0x4f, 0x90, 0x18, 0xad,
+ 0xe3, 0x3c, 0x59, 0xc7, 0x25, 0xfa, 0x86, 0x61,
+ 0x61, 0xb4, 0xdb, 0x8d, 0x1c, 0x43, 0xa7, 0x7e,
+ 0x9a, 0x5f, 0x06, 0xf8, 0xe0, 0x25, 0x39, 0xc2,
+ },
+ { 0x1d, 0xf2, 0xd8, 0x84, 0xa6, 0x3f, 0x7b, 0x41,
+ 0xca, 0x59, 0x63, 0xbe, 0x05, 0xe0, 0x9c, 0x27,
+ 0x27, 0x1b, 0xe4, 0x71, 0x49, 0xac, 0x8e, 0xd2,
+ 0xf0, 0xc6, 0x9a, 0x0d, 0x3f, 0x53, 0x65, 0xb8,
+ },
+};
+#endif
static const uint8_t pbox[32] = {
16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10,
@@ -180,7 +224,10 @@ ascii_to_bin(char ch)
* being initialized, and therefore doesn't need to be made
* reentrant. */
struct const_des_ctx {
- uint8_t init_perm[64], final_perm[64]; /* referenced 2 times each */
+#if USE_ip_mask
+ uint8_t init_perm[64]; /* referenced 2 times */
+#endif
+ uint8_t final_perm[64]; /* 2 times */
uint8_t m_sbox[4][4096]; /* 5 times */
};
#define C (*cctx)
@@ -191,22 +238,27 @@ struct const_des_ctx {
static struct const_des_ctx*
const_des_init(void)
{
- int i, j, b;
- uint8_t u_sbox[8][64];
+ unsigned i, j, b;
struct const_des_ctx *cctx;
+#if !USE_PRECOMPUTED_u_sbox
+ uint8_t u_sbox[8][64];
+
cctx = xmalloc(sizeof(*cctx));
- /*
- * Invert the S-boxes, reordering the input bits.
- */
+ /* Invert the S-boxes, reordering the input bits. */
for (i = 0; i < 8; i++) {
for (j = 0; j < 64; j++) {
b = (j & 0x20) | ((j & 1) << 4) | ((j >> 1) & 0xf);
u_sbox[i][j] = sbox[i][b];
}
}
-
+ for (i = 0; i < 8; i++) {
+ fprintf(stderr, "\t{\t");
+ for (j = 0; j < 64; j+=2)
+ fprintf(stderr, " 0x%02x,", u_sbox[i][j] + u_sbox[i][j+1]*16);
+ fprintf(stderr, "\n\t},\n");
+ }
/*
* Convert the inverted S-boxes into 4 arrays of 8 bits.
* Each will handle 12 bits of the S-box input.
@@ -217,24 +269,45 @@ const_des_init(void)
m_sbox[b][(i << 6) | j] =
(uint8_t)((u_sbox[(b << 1)][i] << 4) |
u_sbox[(b << 1) + 1][j]);
+#else
+ cctx = xmalloc(sizeof(*cctx));
+
+ /*
+ * Convert the inverted S-boxes into 4 arrays of 8 bits.
+ * Each will handle 12 bits of the S-box input.
+ */
+ for (b = 0; b < 4; b++)
+ for (i = 0; i < 64; i++)
+ for (j = 0; j < 64; j++) {
+ uint8_t lo, hi;
+ hi = u_sbox[(b << 1)][i / 2];
+ if (!(i & 1))
+ hi <<= 4;
+ lo = u_sbox[(b << 1) + 1][j / 2];
+ if (j & 1)
+ lo >>= 4;
+ m_sbox[b][(i << 6) | j] = (hi & 0xf0) | (lo & 0x0f);
+ }
+#endif
/*
* Set up the initial & final permutations into a useful form.
*/
for (i = 0; i < 64; i++) {
final_perm[i] = IP[i] - 1;
+#if USE_ip_mask
init_perm[final_perm[i]] = (uint8_t)i;
+#endif
}
return cctx;
}
-#define WANT_REPETITIVE_SPEEDUP 0
struct des_ctx {
const struct const_des_ctx *const_ctx;
uint32_t saltbits; /* referenced 5 times */
-#if WANT_REPETITIVE_SPEEDUP
+#if USE_REPETITIVE_SPEEDUP
uint32_t old_salt; /* 3 times */
uint32_t old_rawkey0, old_rawkey1; /* 3 times each */
#endif
@@ -242,8 +315,12 @@ struct des_ctx {
uint8_t inv_comp_perm[56]; /* 3 times */
uint8_t inv_key_perm[64]; /* 3 times */
uint32_t en_keysl[16], en_keysr[16]; /* 2 times each */
-// uint32_t de_keysl[16], de_keysr[16]; /* 2 times each */
+#if USE_de_keys
+ uint32_t de_keysl[16], de_keysr[16]; /* 2 times each */
+#endif
+#if USE_ip_mask
uint32_t ip_maskl[8][256], ip_maskr[8][256]; /* 9 times each */
+#endif
uint32_t fp_maskl[8][256], fp_maskr[8][256]; /* 9 times each */
uint32_t key_perm_maskl[8][128], key_perm_maskr[8][128]; /* 9 times */
uint32_t comp_maskl[8][128], comp_maskr[8][128]; /* 9 times each */
@@ -260,8 +337,8 @@ struct des_ctx {
#define inv_key_perm (D.inv_key_perm )
#define en_keysl (D.en_keysl )
#define en_keysr (D.en_keysr )
-//#define de_keysl (D.de_keysl )
-//#define de_keysr (D.de_keysr )
+#define de_keysl (D.de_keysl )
+#define de_keysr (D.de_keysr )
#define ip_maskl (D.ip_maskl )
#define ip_maskr (D.ip_maskr )
#define fp_maskl (D.fp_maskl )
@@ -277,14 +354,13 @@ des_init(struct des_ctx *ctx, const struct const_des_ctx *cctx)
{
int i, j, b, k, inbit, obit;
uint32_t p;
- uint32_t il, ir, fl, fr;
const uint32_t *bits28, *bits24;
if (!ctx)
ctx = xmalloc(sizeof(*ctx));
const_ctx = cctx;
-#if WANT_REPETITIVE_SPEEDUP
+#if USE_REPETITIVE_SPEEDUP
old_rawkey0 = old_rawkey1 = 0;
old_salt = 0;
#endif
@@ -292,9 +368,7 @@ des_init(struct des_ctx *ctx, const struct const_des_ctx *cctx)
bits28 = bits32 + 4;
bits24 = bits28 + 4;
- /*
- * Initialise the inverted key permutation.
- */
+ /* Initialise the inverted key permutation. */
for (i = 0; i < 64; i++) {
inv_key_perm[i] = 255;
}
@@ -308,9 +382,7 @@ des_init(struct des_ctx *ctx, const struct const_des_ctx *cctx)
inv_comp_perm[i] = 255;
}
- /*
- * Invert the key compression permutation.
- */
+ /* Invert the key compression permutation. */
for (i = 0; i < 48; i++) {
inv_comp_perm[comp_perm[i] - 1] = (uint8_t)i;
}
@@ -320,19 +392,25 @@ des_init(struct des_ctx *ctx, const struct const_des_ctx *cctx)
* and for the key initial and compression permutations.
*/
for (k = 0; k < 8; k++) {
+ uint32_t il, ir;
+ uint32_t fl, fr;
for (i = 0; i < 256; i++) {
+#if USE_ip_mask
il = 0;
ir = 0;
+#endif
fl = 0;
fr = 0;
for (j = 0; j < 8; j++) {
inbit = 8 * k + j;
if (i & bits8[j]) {
+#if USE_ip_mask
obit = init_perm[inbit];
if (obit < 32)
il |= bits32[obit];
else
ir |= bits32[obit - 32];
+#endif
obit = final_perm[inbit];
if (obit < 32)
fl |= bits32[obit];
@@ -340,8 +418,10 @@ des_init(struct des_ctx *ctx, const struct const_des_ctx *cctx)
fr |= bits32[obit - 32];
}
}
+#if USE_ip_mask
ip_maskl[k][i] = il;
ip_maskr[k][i] = ir;
+#endif
fp_maskl[k][i] = fl;
fp_maskr[k][i] = fr;
}
@@ -409,7 +489,7 @@ setup_salt(struct des_ctx *ctx, uint32_t salt)
uint32_t obit, saltbit;
int i;
-#if WANT_REPETITIVE_SPEEDUP
+#if USE_REPETITIVE_SPEEDUP
if (salt == old_salt)
return;
old_salt = salt;
@@ -435,7 +515,7 @@ des_setkey(struct des_ctx *ctx, const char *key)
rawkey0 = ntohl(*(const uint32_t *) key);
rawkey1 = ntohl(*(const uint32_t *) (key + 4));
-#if WANT_REPETITIVE_SPEEDUP
+#if USE_REPETITIVE_SPEEDUP
if ((rawkey0 | rawkey1)
&& rawkey0 == old_rawkey0
&& rawkey1 == old_rawkey1
@@ -453,7 +533,7 @@ des_setkey(struct des_ctx *ctx, const char *key)
#endif
/*
- * Do key permutation and split into two 28-bit subkeys.
+ * Do key permutation and split into two 28-bit subkeys.
*/
k0 = key_perm_maskl[0][rawkey0 >> 25]
| key_perm_maskl[1][(rawkey0 >> 17) & 0x7f]
@@ -472,7 +552,7 @@ des_setkey(struct des_ctx *ctx, const char *key)
| key_perm_maskr[6][(rawkey1 >> 9) & 0x7f]
| key_perm_maskr[7][(rawkey1 >> 1) & 0x7f];
/*
- * Rotate subkeys and do compression permutation.
+ * Rotate subkeys and do compression permutation.
*/
shifts = 0;
for (round = 0; round < 16; round++) {
@@ -483,7 +563,9 @@ des_setkey(struct des_ctx *ctx, const char *key)
t0 = (k0 << shifts) | (k0 >> (28 - shifts));
t1 = (k1 << shifts) | (k1 >> (28 - shifts));
-// de_keysl[15 - round] =
+#if USE_de_keys
+ de_keysl[15 - round] =
+#endif
en_keysl[round] = comp_maskl[0][(t0 >> 21) & 0x7f]
| comp_maskl[1][(t0 >> 14) & 0x7f]
| comp_maskl[2][(t0 >> 7) & 0x7f]
@@ -493,7 +575,9 @@ des_setkey(struct des_ctx *ctx, const char *key)
| comp_maskl[6][(t1 >> 7) & 0x7f]
| comp_maskl[7][t1 & 0x7f];
-// de_keysr[15 - round] =
+#if USE_de_keys
+ de_keysr[15 - round] =
+#endif
en_keysr[round] = comp_maskr[0][(t0 >> 21) & 0x7f]
| comp_maskr[1][(t0 >> 14) & 0x7f]
| comp_maskr[2][(t0 >> 7) & 0x7f]
@@ -519,7 +603,9 @@ do_des(struct des_ctx *ctx, /*uint32_t l_in, uint32_t r_in,*/ uint32_t *l_out, u
int round;
/* Do initial permutation (IP). */
-#if 0
+#if USE_ip_mask
+ uint32_t l_in = 0;
+ uint32_t r_in = 0;
l = ip_maskl[0][l_in >> 24]
| ip_maskl[1][(l_in >> 16) & 0xff]
| ip_maskl[2][(l_in >> 8) & 0xff]
@@ -588,9 +674,8 @@ do_des(struct des_ctx *ctx, /*uint32_t l_in, uint32_t r_in,*/ uint32_t *l_out, u
r = l;
l = f;
} while (--count);
- /*
- * Do final permutation (inverse of IP).
- */
+
+ /* Do final permutation (inverse of IP). */
*l_out = fp_maskl[0][l >> 24]
| fp_maskl[1][(l >> 16) & 0xff]
| fp_maskl[2][(l >> 8) & 0xff]
@@ -613,7 +698,8 @@ do_des(struct des_ctx *ctx, /*uint32_t l_in, uint32_t r_in,*/ uint32_t *l_out, u
static char *
NOINLINE
-des_crypt(struct des_ctx *ctx, char output[21], const unsigned char *key, const unsigned char *setting)
+des_crypt(struct des_ctx *ctx, char output[DES_OUT_BUFSIZE],
+ const unsigned char *key, const unsigned char *setting)
{
uint32_t salt, l, r0, r1, keybuf[2];
uint8_t *p, *q;
@@ -679,7 +765,11 @@ des_crypt(struct des_ctx *ctx, char output[21], const unsigned char *key, const
return output;
}
-#undef WANT_REPETITIVE_SPEEDUP
+#undef USE_PRECOMPUTED_u_sbox
+#undef USE_REPETITIVE_SPEEDUP
+#undef USE_ip_mask
+#undef USE_de_keys
+
#undef C
#undef init_perm
#undef final_perm
@@ -695,8 +785,8 @@ des_crypt(struct des_ctx *ctx, char output[21], const unsigned char *key, const
#undef inv_key_perm
#undef en_keysl
#undef en_keysr
-//#undef de_keysl
-//#undef de_keysr
+#undef de_keysl
+#undef de_keysr
#undef ip_maskl
#undef ip_maskr
#undef fp_maskl
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 08:56:46 +0000